feat(pi): port the managed stack to Pi 0.87.1 and Pi Web 0.9.3

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pi-devin",
-  "version": "0.1.2",
+  "version": "0.2.1",
   "description": "Pi provider for Devin Local models. Auth and catalog come from the local Devin CLI; Pi stays the harness.",
   "type": "module",
   "keywords": [
@@ -28,18 +28,16 @@
     "AGENTS.md",
     "LICENSE"
   ],
-  "scripts": {
-    "typecheck": "tsc --noEmit"
-  },
   "peerDependencies": {
-    "@earendil-works/pi-ai": "*",
-    "@earendil-works/pi-coding-agent": "*"
+    "@earendil-works/pi-ai": ">=0.86.0",
+    "@earendil-works/pi-coding-agent": ">=0.86.0"
   },
   "devDependencies": {
     "@types/node": "^24.13.3",
+    "tsx": "^4.23.15",
     "typescript": "^5.9.2"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=22.19.0"
   }
 }